- A lip. Labium is the singular of the Latin neuter noun meaning "a lip." The plural is labia.
* * *- l. inferius oris [TA] SYN: lower lip.- l. majus [TA] one of two rounded folds of integument forming the lateral boundaries of the pudendal cleft. The labia majora are the female homolog of the scrotum. SYN: l. majus pudendi [TA], large pudendal lip.- l. minus [TA] one of two narrow longitudinal folds of mucous membrane enclosed in the pudendal cleft within the labia majora; posteriorly, they gradually merge into the labia majora and join to form the frenulum labiorum pudendi (fourchette); anteriorly, each l. divides into two portions that unite with those of the opposite side in front of the glans clitoridis to form the prepuce. SYN: l. minus pudendi, small pudendal lip.- labia oris [TA] SYN: lips of mouth, under lip. See lip (1).- l. superius oris [TA] SYN: upper lip.- l. vocale, pl.labia vocalia SYN: vocal fold.
* * *2) a lower mouthpart of an insect that is formed by the second pair of maxillae united in the midline
* * *n. (pl. labia)a lip-shaped structure, especially either of the two pairs of skin folds that enclose the vulva. The larger outer pair are known as the labia majora and the smaller inner pair the labia minora.
* * *la·bi·um (laґbe-əm) pl. laґbia [L.] 1. lip. 2. a term used in anatomical nomenclature for a liplike structure. 3. (in the pl.) the labia majora and minora pudendi. See also limbus and margo.
Medical dictionary. 2011.